Bacterial Blight
Pseudomonas syringae, Xanthomonas spp., Erwinia spp.
Bacteria
Leaves
Stems
Flowers
Overview
A general term for bacterial diseases causing rapid browning and death of leaves, shoots, and flowers. Various bacterial species cause blight on different host plants.
Symptoms
Water-soaked lesions on leaves that rapidly enlarge and turn brown to black. Shoot tips may wilt and die. Blossoms turn brown. Cankers on stems. Bacterial ooze may be visible in humid conditions.
Environmental Conditions
Humid
Prevention
Use disease-free seed and plants. Apply copper sprays preventively. Avoid overhead irrigation. Ensure good air circulation. Remove crop debris.
Management
Apply copper-based bactericides. Remove infected plant parts. Improve air circulation. Avoid working with wet plants. Rotate crops.